Multi-scale hygro-thermo-mechanical simulation of concrete drying shrinkage damage
Abstract
Predicting drying shrinkage-induced damage in concrete necessitates a multi-scale approach. This study introduces a comprehensive hygro-thermo-mechanical modeling framework to investigate this damage from the molecular to the meso‑scale. At the molecular level, the classical density functional theory (cDFT) is adopted to model the water-calcium silicate hydrate (C-S-H) layer interactions. At the micro-scale, thermodynamic models, informed by the cement paste's pore size distribution (PSD), simulate its desorption and shrinkage behaviors. This molecular and micro-scale information is then integrated to predict moisture transport and resulting shrinkage strains at the meso‑scale. The internal stresses arising from these shrinkage strains subsequently drive drying shrinkage-induced damage, the evolution of which is characterized at the meso‑scale by a thermodynamically consistent hygro-thermo-mechanical phase field model. Thermal and mechanical processes are simulated using the properties of sufficiently mature concrete, ensuring simplicity without compromising accuracy. The predictive capabilities of this multi-scale framework are validated through representative simulations compared against experimental data, demonstrating its accuracy across the different scales.
Details
- Organisationseinheit(en)
-
Institut für Photonik
Fakultät für Mathematik und Physik
- Externe Organisation(en)
-
City University of Hong Kong
Jinan University
Tongji University
- Typ
- Artikel
- Journal
- International Journal of Mechanical Sciences
- Band
- 301
- ISSN
- 0020-7403
- Publikationsdatum
- 01.09.2025
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Tief- und Ingenieurbau, Allgemeine Materialwissenschaften, Physik der kondensierten Materie, Luft- und Raumfahrttechnik, Meerestechnik, Werkstoffmechanik, Maschinenbau, Angewandte Mathematik
- Elektronische Version(en)
-
https://doi.org/10.1016/j.ijmecsci.2025.110546 (Zugang:
Geschlossen
)
